Steam-jet vacuum pump



Feb. 10. 1925.

P. A. BANCEL STEAM JET VACUUM PUMP Filed Nov. 9, 192 0 K TT K I 1 Q m I! "H RE/MP 1; W I U {a j U N INVENTOR Pa;

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BY v/ 64 ATTOR EY Patented Feb. 10, 1925.

UNITED STATES v 1,526,040 PATENT OFFICE.

PAUL A. BANGEL, E NUTLEY, NEW JERSEY, ASSIGNOR 'ro INGEEsoLL-EAND con} PANY, or JERsEY CITY, NEW JERSEY, A CORPORATION on EW JERSEY.

STEAM-JET VACUUM PUMP.

Application filed November 9, 1920. Serial No. 422,798.

I To all whom it may concern:

Be' it known that I, PAUL A. BANoEL, a. citizen of the United States, and resident of Nutley, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Steam-Jet Vacuum Pumps, of which the following is a specification.

This invention relates to barometric counter current jet condensers, but more particularly to a condenser of that type, in which a separator has usually been provided either in the top of the condenser or outside the condenser, to prevent the passage of water into the vacuum pump.

A condenser of this type is apt to boil over under certain operating conditions, and this phenomenon is well known in the art and is termed getting hot. For these and other reasons it has been found that such condensers at different times, may draw water into the vacuum pump. Pressure builds up in the steam space below the water and holds the water up in the water chamber, preventing it from falling down, and

finally, the pull of the vacuum pump in 1tsattempt to pull through the water, picks upgreat masses of water and the condenser is said to boil over, in a. manner analogous to the boiling over of a pot or other heated receptacle.

The primary object of the present invention is to combine the outside type of separator with an intermediate chamber to receive and condense the steam exhausted by augmenters removing the air. The vacuum pump is thus protected by the separator, which also performs the function of an intercooler and intermediate condenser between steam augmenters and the vacuum pump to be protected.

To hese and other ends which will her inafter appear, the invention consists of apparatus substantially as hereinafter fully described and claimed in this specification and shown in the accompanying drawing, which is a diagrammatic view of a main condenser and intermediate separator and condenser constructed in accordance with the invention.

Referring to the drawings, the body portion A of the main condenser is connected to the hot well B, by the stand pipe 0, shown broken away to indicate that the condenser 1s supported "at the required height above the hot well for this type of condenser and in this instance it may be assumed that the section of the stand pipe 0 omitted at the break would ordinarily be about thirty-four (34) feet in length in an The body A is also. provided with a water reservoir F above the inlet D, having a weir G suitably supported by the ring H from the'sides of the body. A crown sheet J, forming a bafile for the falling cascade of Water, may be, suitably supported below the weir as by means of the brackets K. Water enters the reservoirthrough the inlet L and the air in the condensable mixture is drawn off from the to of the condenser through the outlet pipe having vacuum producing apparatus in connection therewith, for withdrawing the air.

As shown, primary steam jets P, of which there may be one or more as desired, withdraw the air from the main condenser through the pipe 0 and passages Q and discharge it into a smaller condenser and separator R in the form of a chamber located intermediate the jets P and the pipe connection. S adapted to be connected to any usual secondary source of vacuum, which taken as illustrative figures by way of ex ample.

The I intermediate condenser R is constructed so that it will function as a separator and in the event of the main condenser boiling over prevent the passage of water into the vacuum pump or the secondary steam jets, either of which may be used to draw the air or vapor from the intermediate condenser and to compress it from 25 vacuum to atmosphere. As shown in this instance, the intermediate condenser chamber R is provided with a water inlet T, and an outlet for air and water having the neck U forming a. weir, and a downwardly extending pipe or apron V within the outlet casing W connecting with the drain pipe X leading to the hot well B. The vacuum pump pipe S is preferably connectedto the casing W above the lower end of the downwardly extending apron V of the air and water outlet in order to shield said vacuum pump connection. The vacuum pump is thus protected: by the construction of the separator R, which also performs the func= tion of an intermediate condenser between the steam augmenters or jets and the vac uum pump to;be protected.

In order to take the watersupply for the intermediate condenser and separator [B from the main source of supply for the main condenser, the arrangement of primary steam jets and intermediate condenser and separator is preferably so located vertically, thatthe water inlet pipe T is from about five to about ten feet below the ele vation of the water inlet L on the main condenser. Such arrangement overcomes the differential pressure between the main and intermediate condensers, due to the fact that the vacuum in the intermediate condenser is lower than that of the main condenser, so that its pressure is higher by connected to a main condenser, primary augmenter jets mounted on said separator for compressing air and gases Withdrawn from the main condenser and for discharging them at low vacuum into the separator,

said separator having a condenser chamber provided with an inlet and an outlet for water, a casing around the water outlet, adapted to be connected to'secondary vacuum producing apparatus, and means within theroutlet casing for protecting the connection to secondary vacuum producing apparatus.

2. A steam jet vacuum pump for condenser comprising an intermediate condenser forming a separator adapted to be connected to a main'condenser, primary augmenter jets mounted on said separator for compressing air and gases withdrawn from the main condenser and for discharging them at low vacuum into the. separator, said separator having a condenser chamber provided with an inlet and an outlet for water, a casing around the water outlet adapted to be connected to a secondary vacuum producing apparatus, an apron extending downwardly from the said water outlet, and a vacuum pipe connected to the outlet casing above the lower end of said apron, whereby j the secondary vacuum producing apparatus will be protected. 7

3. A steam jet vacuum pump for condensers, comprising a casing having a separator chamber forming an intercondenser adapted to be connected to the outlet pipe of a main condenser, primary augmenter steam jets located on said casing and ar l'angedfito compress air and gases drawn from a main condenser and discharge them at low vacuum into the said separator chamber, a water inlet for said separator chamber and an outlet, an outlet casing portion beyond the outlet of the separator chamber having a drain and also adapted to be. connected to a secondary source of vacuum, and an apron in the outlet casing portion extending from the outlet of the separator chamber'to protect the connection to the secondary source of vacuum.

In testimony whereof I have signed this specification.

PAUL A. GEL. 

